Bousky



May 27, 1952 s. BOUSKY 2,598,215

ROTARY PUMP VALVE CONSTRUCTION FOR COMPRESSORS Filed April 25, 1947 3 Sheets-Sheet 1 FIG. -I

I9 27 H] I" 2o \4 2' 3 I 3 2| '0 5 5'3 2 W 2 i l5. y

5 INVENTOR.

SAMUEL BOUSKY BY I,

ATTORNEY May 27, 1952 s. BOUSKY ROTARY PUMP VALVE CONSTRUCTION FOR COMPRESSORS Filed April 25, 1947 3 Sheets-Sheet 2 FIG. 2

FIG. 3

INVENTOR. SAMUEL BOUSKY ATTORNEY May 27, 1952 BQUSKY 2,598,216

ROTARY PUMP VALVE CONSTRUCTION FOR COMPRESSOR-S Filed April 25, 1947 5 Sheets-Sheet 5 FIG. 5

ml; /l/lll'\ 34 3'3 in SAMUEL BOUSKY ATTORNEY Patented May 27, 1952 V v 7 2,598,216 somnyi..eiimvmmmswniaiies FOR ooMrimssons is iti fs'efiii sew-ms. (015251-119) and construction a' 'much reduced overalliistiatedinthe accompanying drawings, infwhich:

I F re V QW' eme ic? compressor unit withpart ljoffthe housing remove'd,' showing the stator *io'tor and" shaft in elevation 'and the end plate s, cornpres sor pump and check" valves in longitudinal "section;

Figure 2 is a view in cross section taken along line 2--2 of Figure 1 showing the compressor pump ,chamber and passages and leading thereto; Figure 3 is a view in cross section taken along line 33 of 1,igu1je 1, showing passages leading from the'eonipression chamber; Figure 4 is an enlarged "detail view in longitudirial sect on showing the improved checkvalve, wth its'liinit stop, for the outlet passage-from theconipression chamber; and I figure 5is' an enlarged view in top plan or the check :valve'shown in Figure i'without the limit and with anchoring means. p I t p f Referringmore particularlyto the drawings, th' h rfmtically sealed motor 'cornpre's'sonuni-t, whichhasheen referred to'as a particularly suitable devicein which to use my new and novelcheck valve, may be of the same type disclosed' 'in the co-pending application of Samuel Bouskyforcompressor, Serial No. 743,342filed April 23, 1947, now abandoned. The housing is shown at l enclosing a rotor 3 which rotates with a shaft 4 concentrically about a stator 2. The housing inlet is shown at 5 and the outlet at 6.

Between an upper end wall I and a lower end lproofper fornfance at: extremely high not w fii fd" hr valve 16 through alfpassifge' 11 into com 7 essign chamber 11 mane n ts e of'th divider blink 1 "A er... e eip'qmp e 'sed b t 115m- M65 in fil 'fiqm Q m i f h j e asves f through.ali n t e valve; enerallyindicated n-Figuiies and to a sure berto an f her t rqu h u 51 flow ack iifom the outlet ackfin'to -t-h comnt s n. '.Q ?F i reg muons "existing b h q v a l i 0 tan in; Figure Y 4 r h le i'derji q aect mm fi et eith k v r 40 purpose n easily machine dfround rages 21 is mime-.1 tim j z t he pfiif i i m i e ing lower than the "bottom of "recess "2!" when'the eh ekyal e i i ser ed forn v Assh'dwhiri Figures 4am spline check valve itself is preferably of very thin springy metal to include a cut out rim portion 24 which is substantially circular to be accommodated in the circular recess 21. This rim portion has a pair of holes to receive bolts 26 to secure the same reventing any to the upper end plate 7 in the bottom of recess 21. The rim 24 has integral therewith a valve leaf that extends towards the holes for the anchoring bolts 26 from the opposite side of the rim. This valve leaf 23 is round and enlarged and may be disposed at approximately the center of the rim. The resilient character of the check valve makes it so that when it is anchored by bolts 25 the valve leaf 23 is resiliently forced against the insert 33 to overlap passage l8 and normally resiliently close the same so as to function as an exhaust check valve. The check valve, being circular, is readily adaptable for use in the easily machined cavity 21. Another advantageous feature is the shape of the check valve itself wherein the sum efiect of the rim 24 and valve leaf 23 has about the same resilience and valve action as that of a cantilever straight leaf type of valve but occupying a much smaller and more conveniently arranged space. The combination of mass and inherent resilience in the valve leaf itself is such as to permit a very high speed actuation and closure for while the valve must open and close during each revolution of the pump, the total time required for opening and closing actually occupies only between 15% and 30% of this total interval, depending upon operating pressures. Thus for a pump that makes one revolution in ,4, of a second the valve must open and close in .003 to .005 sec ond on the average.

Above the valve leaf may be arranged a back stop comprising a separate, or integral, superimposed member 34 also anchored by screw bolts 26 and having a raised radially inwardly and angularly extending prong 25 which acts as a limit stop for the opening movements of the valve leaf 23. Also resting on the upper wall surrounding the recess 21 is a seal in the form of a dish shaped plate 29 having a portion 32 that extends into the recess 27 to seal the same. Another plate 30 is secured to the upper end wall 7 by a screw 28 and has an angular end 3! that rests against plate 32 to hold it in place. The prong 25 acts as a limit stop for the opening movements of the check valve piece 23. This construction permits the use of a very thin and lightweight check valve 23 which will be very sensitive so as to permit passage thereby of compressed refrigerant gas from the compression chamber; The novel limit stop construction not only limits the opening movement of the chest: valve but also prevents its destruction or warping under severe pressure conditions.

While a pair of screw bolts 26 have been described and shown as suitable anchoring means for the check valve and back stop, it should be understood that other anchoring means may be employed if desired, the important feature being that the flexure of the valve rim portion opposite the valve leaf 23 be restricted, leaving the valve leaf 23 free to open in response to discharge impulses through passage l8 sufficient to overcome the resilient closure thereof. As previously stated the backstop may take forms other than that actually shown, the important feature being that it acts as a limit stop to prevent excessive opening movements of the valve leaf 23.

I claim:

l. A check valve comprising a substantially 4 circular thin fiat spring metal rim portion disposed concentrically with respect to the passage to be valved, said rim portion having a valve leaf of thin fiat spring metal extending radially inwardly and terminating in an enlarged portion adapted to resiliently contact in overlapping relationship the passage to normally maintain the latter closed under the effect of the inherent springy characteristics of said check valve, anchoring means for anchoring only that part of the rim portion opposite the inner radially extending end of said valve leaf, leaving said valve leaf and the remaining part of said rim portion free to flex with respect to said anchoring means and a limit stop means for limiting excessive opening movements of said valve leaf, said limit stop being anchored by said anchoring means and having a member superimposed in normally spaced-position above said valve leaf.

2. A reed valve and a passage to be valved thereby, said valve being comprised of fiat resilient material having an annular portion and a re-entrant radially inwardly extending central flap section, anchoring means for anchoring a part of said annular portion to dispose said annular portion concentrically with the passage to be valved and to normally dispose said central flap section in overlapping contact with said passage to close the same and so that the remainder of said annular flap portion is free to flex with respect to said anchoring means.

3. A reed valve and a passage to be valved thereby, said valve being comprised of fiat resilient material having an annular portion and a re-entrant radially inwardly extending central fiat section, anchoring means for said annular portion to dispose said annular portion concentrically with the passage to be valved and to normally dispose said central fiap section in overlapping contact with said passage to close the same, said anchoring means being adapted to anchor only a portion of the rim of the annular portion opposite the re-entrant central flap section and being otherwise disassociated with said central flap section so that the central flap section and the remainder of said rim portion are free to flex with respect to said anchoring means.

SAMUEL BOUSKY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,283,581 Smith Nov. 5, 1918 2,000,883 Cullen et al. May 7, 1935 2,001,885 Ohmart May 21, 1935 2,019,747 Taylor Nov. 5, 1935 2,027,137 Yoemans Jan. 7, 1936 2,062,341 Wells Dec. 1, 1936 2,118,356 Money May 24, 1938 2,130,349 Kucher Sept. 20, 1938 2,151,746 Cody Mar. 28, 1939 FOREIGN PATENTS Number Country Date 87,286 Sweden of 1936 

